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Documentation: ABI: Add sysfs-class-reboot-mode-reboot_modes

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Add ABI documentation for /sys/class/reboot-mode/*/reboot_modes, a
read-only sysfs attribute exposing the list of supported reboot-mode
arguments. This file is created by reboot-mode framework and provides a
user-readable interface to query available reboot-mode arguments.

Reviewed-by: Bartosz Golaszewski <brgl@kernel.org>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Shivendra Pratap <shivendra.pratap@oss.qualcomm.com>
Link: https://patch.msgid.link/20260224-next-15nov_expose_sysfs-v24-1-4ee5b49d5a06@oss.qualcomm.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Shivendra Pratap
2026-02-24 12:12:26 +05:30
committed by Sebastian Reichel
parent c10b68e331
commit d3da03025e
1 changed files with 36 additions and 0 deletions
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Documentation/ABI/testing/sysfs-class-reboot-mode-reboot_modes Normal file
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What: /sys/class/reboot-mode/<driver>/reboot_modes
Date: March 2026(TBD)
KernelVersion: TBD
Contact: linux-pm@vger.kernel.org
Description:
This interface exposes the reboot-mode arguments
registered with the reboot-mode framework. It is
a read-only interface and provides a space
separated list of reboot-mode arguments supported
on the current platform.
Example:
recovery fastboot bootloader
The exact sysfs path may vary depending on the
name of the driver that registers the arguments.
Example:
/sys/class/reboot-mode/nvmem-reboot-mode/reboot_modes
/sys/class/reboot-mode/syscon-reboot-mode/reboot_modes
/sys/class/reboot-mode/qcom-pon/reboot_modes
The supported arguments can be used by userspace to
invoke device reset using the standard reboot() system
call interface, with the "argument" as string to "*arg"
parameter along with LINUX_REBOOT_CMD_RESTART2.
A driver can expose the supported arguments by
registering them with the reboot-mode framework
using the property names that follow the
mode-<argument> format.
Example:
mode-bootloader, mode-recovery.
This attribute is useful for scripts or initramfs
logic that need to programmatically determine
which reboot-mode arguments are valid before
triggering a reboot.